Effect of ultrasound treatment on the physicochemical properties of alkaline lignin

被引：40

作者：

Garcia, Araceli ^{[1
]}

Erdocia, Xabier ^{[1
]}

Gonzalez Alriols, Maria ^{[1
]}

Labidi, Jalel ^{[1
]}

机构：

[1] Univ Basque Country UPV EHU, Dept Chem & Environm Engn, Donostia San Sebastian 20018, Spain

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2012年 / 62卷

关键词：

Biorefinery; Lignin; Hemicelluloses; Ultrasound treatment; Process intensification; SOLUBLE HEMICELLULOSES; CAVITATIONAL ACTIVITY; FT-IR; EXTRACTION; POLYSACCHARIDES; DEGRADATION;

D O I：

10.1016/j.cep.2012.07.011

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Different sonication times (15, 30,60 and 120 min) were applied in aqueous media to olive tree pruning residues lignin obtained by alkaline fractionation (7.5% w/w NaOH, solid to liquid ratio 1:10 w/w, 90 min, 85 degrees C). The observed sample solubilisation ratio due to ultrasonic irradiation was 24-28%. The resulted liquid fractions were analyzed by HPLC in order to determine their mono- and polysaccharides content (up to 0.404 and 3.393 g/L, respectively). The insoluble solid fractions were chemically characterized, and their chemical structure (ATR-IR, GPC), thermal behavior (TGA) and antioxidant activity (Folin-Ciocalteu and ABTS assays) were studied. The results showed that ultrasounds cleaved lignin-carbohydrate linkages and promoted hemicellulosic impurities removal from the alkaline sample (up to 32% of initial carbohydrates content), but also affected to insoluble lignin content (19% of Klason lignin solubilisation). (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：150 / 158

页数：9

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